Incubator attachment



zum, 1923.)

0. P. MORRISON. INCUBATORv ATTACHMENT.

FILED AUG-3| 1922. 2 SHEETS-SHEET 2.

Patented nlan. Z, i923,

narran starts retain- OSCAR P. MORRISON, OF GOMEZ, TEXAS.

INCUBATOR ATTACHMENT.

applicati@ filed .August a, 1922. seriai ir. 579,539.

To all whom it may concern.' y l Be it known that OSCAR P. MORRISON, acitizen of the United States, residing at Gomez, in the county of Terryand State of Texas, have invented a new and useful lncu-A batorAttachment, of which the following is a specification.

This invention aims to provide a simple means whereby, when thetemperature rises or falls beyond predetermined limits, inan incubator,a to admonish an attendant that the incubator needs attention. i

In the drawings v Figure 1 shows iii vertical section, a deviceconstructed in accordance with the invention, parts being in elevation;Figure 2 is a section on the line 2 2 of Figure f1; Figure 3 is asection onl the line 3-3 of Figure 1.

The device forming the subject matter of this application is adapted tobe used on incubators of widely different sorts, but by way ofillustration, there is depicted in the drawings a portion 'of the frame1 of an incubator, the incubator being heated by any suitable means,.such as a fiue 2 having a lateral branch 3 discharging into the incu-Abator. rlhe flow of air through the flue 2 may be under the control of adamper d, pivotally supported at 5 on a lever 6, fulcrumed intermediateits ends at 7 on the frame 1, and carrying an adjustable counterweight8. The numeral 9 marks a thermostatically o-perated member such as arod, pivoted at 1G to y the lever 6 and connected its lower end to athermostat. 11 mountedv on a bracket 12 or otherwise. i

in carrying out the invention, a pair of supports 14; and 15 are mountedon 'the frame 1 of the incubator, both the upper support 1li and thelower support 15 being provided with openings 16 wherein the rod 9slides freely. The lower support 15 is supplied with bearings 17.v rEhenumeral 18 marks a loop-shaped arm, the ends of which are mountedpivotally in the bearings 17. A

torsion spring 19 is disposed between the bearings 17 and is mounted onthe aforesaid ends of the arm 18, one end 2O of the spring bearing onthe support 15, and the other end 21 of the spring engaging one sideportion of the arm 18, the function of the spring being to swing the armin the direction of the arrow A in Figure 1. A trigger 22 is pivotallymounted at 23 on the support 15 and has an signal will be soundedthereby' opening 211, through which the rod 9 passes slidably, the rodbeing provided with a projection 25 adapted to engage the trigger, whenthe rod moves downwardly beyond a predetermined point. The trigger 22isprovided at inner endwith a finger 26. A detent 27 is pivotallymounted at 28 on the support 15.

vThe upper support 141 is provided with a mechanism duplicating thatdescribed in connection with the lowersupport, and the mechanism on thesupport 111 may be dismissed with a brief catalogue of'parts, the saidmechanism including a trigger 29 mounted pivotally at 3() on the support111 and having an opening 81' for the passage of the rod 9, theprojection on. the'rod being` marked by the numeral 32 and the iinger'ofthe trigger appearing at 33., The detent is denoted by the nuineraltandis mounted pivotally at 35 on the support 14.` The spring-actuated,loop-shaped arm is desig- -nated by the numeral 36 and the bearingswhichV carry the arm for swinging movement are denoted by the numeral37. The arm 36, when set free, tends toy swing in the direction of thearrow B in Figure. 1, and the projection 32on the'rod9 cooperates withthe trigger 29 when the rod 9 moves upwardly beyond a4 predeterminedpoint. 1n order to prevent 'the arm 18 from` swinging, in the CIKdirection of the arrow A. against the rod9,

and in order to preveiitfthenrm 36 from swinging `in the direction ofthe arrow B against the rod 9, a stop is provided, the

same being, if desired, in the forni of a rod 38, mounted on thesupports 14 and 15, and extended therebetween.

` A.' signal of any desired sort is located at a point remote from theincubator land may be disposed in the bed roomor oice of anattendant.rlhe signal may take the forni of a spring-actuated alarm 39 supportedat 10 and including a gong 11 adapted to be engaged by a striker 42thewinding button being marked by the numeral L13. The alarm is held setthrough the instrumentality of a pawl 14 pivoted at L15 0n the casingL16"v of the alarm and adapted to cooperate with a ratchet wheel 17,constituting apart of the alarm mechanism.

Connections 18 and i9 are provided, the same ordinarily being in theformy ofy fleXib le elements, having their upper ends mounted on thepawl ad. intermediate their ends, the connections 48 and 49 passslidably over airleaders 59 on the frame 1 of the incubator, theconnections passing inside of the frame. The inner end of the connection49 is secured to the intermediate portion of the arm 86, whereas theinner end of the connection 48 is attached to the intermediate portionof the arm 18.

in practical operation, the arm 18 is swung rearwardly into the positionshown in Figure 1, and the detent 27 is extended forwardly across thefree end of the arm 18, the outer end oi the detent 27 being engagedwith the finger 26 on the trigger 22, the spring 19 being under tension.In a similar way, the arm 8 6 is held by the detent 34 and the trigger29.

Should tue temperature in the incubator fall to a point endangering theeggs in the incubator, the rod 9 will be carried downwardly by theaction of the thermostat 11, the projection 25 on the rod 9 engaging thetrigger 22 and swinging the trigger downwardly, the finger 26 beingdetached from the member 27, and the arm 18 swinging forwardly, underthe action of the spring 19 until the arm strikesthe stop rod 28. Thenthe arm swings forwardly in the direction of the arrow A, a pull will beexerted on the flexible connection 48, the pawl 44 will be disengagedfrom the ratchet wheel 47, and the gong 41 will sound. n

Similarly, when the temperature in the incubator rises to the dangerpoint, the pro` jection 32 cooperating with the trigger 39 will detachthe trigger from the detent 34, the arm 36 being set free, and swingingin the direction of the arrow B against the stop rod 38, a pull beingexerted on the connection 49, the y from the ratchet wheel 47 andthegong 41 being sounded. v

lWhat is claimed is 1. 1n an incubator, a thermostically operatedmember' a signal; a spring actuatedI arm mounted i'or swinging movement;a connection between the arm and the signal; a detent cooperating withthe arm to hold the same set; and a trigger mounted :tor swingingmovement and engaged releasably with the detent, said member embodyingpawl 44 being disengagedl means for disengaging the trigger trom thedetent. y n l l 2. in an incubator, a thermostatically operated member;a signal; an arm mounted for swinging movement; a connection between thearm Vand the signal; a detent pivotally mounted at one end and extendedacross the arm to hold the arm set; and a trigger mounted for swingingmovement and engaged releasably with the detent, the thermostaticallyoperated member being movable within limits, independently of thetrigger, and embodying a projection adapted to engage the'trigger whensaid member has moved beyond a predetermined point.

3. in an incubator, a thermostaticalljf operated member; a signal; aspring-actuated arm supported for swinging movement; a connectionbetween the arm and the signal; a movable detent coacting with the armto hold the arm set; and a movable'trigger engaging the detentreleasably, said member embodying means for engaging' the trigger, torelease the trigger from the detent, after said member has moved apredetermined amount.

, 4. in an i'cubator,r a thern'iostatically operated member movable inopposite directions; a signal; spring-actuated arms supported forswinging movement; connections between the arms and the signal; de-

tents cooperating with the arms to hold they same set; triggers mountedfor swinging movement and engaged releasably with the detente; andprojections on the thermostat ically operatec member, one projectioncooperating' with one trigger to release the same when thethermostatically voperated member moved in one direction, and the otherprojection cooperating with the other trigger to release the same, when'the ther! mostatically operated member opposite direction.

in testimony that I claim the 'foregoing as my own., li h-ave heretoaidixed my signature in the presence oi two witnesses.

moves in an Witnesses 144A. CornLiiNn, W. H. DALLAS.

